GB1360668A - Frequency control circuits - Google Patents

Frequency control circuits

Info

Publication number
GB1360668A
GB1360668A GB5528771A GB5528771A GB1360668A GB 1360668 A GB1360668 A GB 1360668A GB 5528771 A GB5528771 A GB 5528771A GB 5528771 A GB5528771 A GB 5528771A GB 1360668 A GB1360668 A GB 1360668A
Authority
GB
United Kingdom
Prior art keywords
output
monostable
discriminator
input connected
amplifier
Prior art date
Legal status (The legal status is an assumption and is not a legal conclusion. Google has not performed a legal analysis and makes no representation as to the accuracy of the status listed.)
Expired
Application number
GB5528771A
Current Assignee (The listed assignees may be inaccurate. Google has not performed a legal analysis and makes no representation or warranty as to the accuracy of the list.)
Siemens Schweiz AG
Original Assignee
Siemens Albis AG
Priority date (The priority date is an assumption and is not a legal conclusion. Google has not performed a legal analysis and makes no representation as to the accuracy of the date listed.)
Filing date
Publication date
Priority claimed from CH1869870A external-priority patent/CH518646A/en
Application filed by Siemens Albis AG filed Critical Siemens Albis AG
Publication of GB1360668A publication Critical patent/GB1360668A/en
Expired legal-status Critical Current

Links

Classifications

    • G—PHYSICS
    • G01—MEASURING; TESTING
    • G01S—RADIO DIRECTION-FINDING; RADIO NAVIGATION; DETERMINING DISTANCE OR VELOCITY BY USE OF RADIO WAVES; LOCATING OR PRESENCE-DETECTING BY USE OF THE REFLECTION OR RERADIATION OF RADIO WAVES; ANALOGOUS ARRANGEMENTS USING OTHER WAVES
    • G01S13/00—Systems using the reflection or reradiation of radio waves, e.g. radar systems; Analogous systems using reflection or reradiation of waves whose nature or wavelength is irrelevant or unspecified
    • G01S13/74—Systems using reradiation of radio waves, e.g. secondary radar systems; Analogous systems
    • G01S13/82—Systems using reradiation of radio waves, e.g. secondary radar systems; Analogous systems wherein continuous-type signals are transmitted
    • G01S13/84—Systems using reradiation of radio waves, e.g. secondary radar systems; Analogous systems wherein continuous-type signals are transmitted for distance determination by phase measurement
    • H—ELECTRICITY
    • H03—ELECTRONIC CIRCUITRY
    • H03L—AUTOMATIC CONTROL, STARTING, SYNCHRONISATION OR STABILISATION OF GENERATORS OF ELECTRONIC OSCILLATIONS OR PULSES
    • H03L7/00—Automatic control of frequency or phase; Synchronisation
    • H03L7/06—Automatic control of frequency or phase; Synchronisation using a reference signal applied to a frequency- or phase-locked loop
    • H03L7/08—Details of the phase-locked loop
    • H03L7/10—Details of the phase-locked loop for assuring initial synchronisation or for broadening the capture range
    • H03L7/12—Details of the phase-locked loop for assuring initial synchronisation or for broadening the capture range using a scanning signal

Landscapes

  • Engineering & Computer Science (AREA)
  • Radar, Positioning & Navigation (AREA)
  • Remote Sensing (AREA)
  • Computer Networks & Wireless Communication (AREA)
  • Physics & Mathematics (AREA)
  • General Physics & Mathematics (AREA)
  • Transmitters (AREA)
  • Control Of Amplification And Gain Control (AREA)

Abstract

1360668 Transceivers SIEMENS-ALBIS AG 29 Nov 1971 [17 Dec 1970] 55287/71 Heading H3A A frequency control circuit as claimed in claim 2 of Specification 1,285,526 wherein a further monostable circuit 14 having a resetting time greater than the sum of the resetting time of the monostable circuit 9 plus the time required to substantially discharge the capacitor 2 has its input connected in parallel to that of monostable 9, and that output of monostable 14 which produces an output signal when in its rest state being connected via a further resistor 16 to the input of amplifier 4. The control amplifier may be a differential amplifier (Fig. 2, not shown) having a first input connected to the output of discriminator 8 and a second input connected to the output of 14 for adjusting the operative point to the centre of the capture range of discriminator 8. In operation, monostable circuits 9, 14 are set simultaneously by the opening of switch 5, but the output of 14 changes from a positive value to zero and at the end of the pulse duration, the positive value re-appears and capacitor 2 acquires a further charge sufficient to adjust the operative point to the desired discriminator centre frequency.
GB5528771A 1970-12-17 1971-11-29 Frequency control circuits Expired GB1360668A (en)

Applications Claiming Priority (1)

Application Number Priority Date Filing Date Title
CH1869870A CH518646A (en) 1970-05-26 1970-12-17 Frequency control circuit for a transceiver of an electrical distance measuring system that can be switched either as a main or as a secondary station

Publications (1)

Publication Number Publication Date
GB1360668A true GB1360668A (en) 1974-07-17

Family

ID=4434734

Family Applications (1)

Application Number Title Priority Date Filing Date
GB5528771A Expired GB1360668A (en) 1970-12-17 1971-11-29 Frequency control circuits

Country Status (2)

Country Link
DE (1) DE2104844C3 (en)
GB (1) GB1360668A (en)

Also Published As

Publication number Publication date
DE2104844A1 (en) 1972-07-06
DE2104844B2 (en) 1978-06-22
DE2104844C3 (en) 1979-03-15

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Legal Events

Date Code Title Description
PS Patent sealed
PCNP Patent ceased through non-payment of renewal fee